#include <stdio.h>
#include <string.h>
void covert(int *a,int len)
{
    if(len<2)
        return ;
    covert(a+1,len-2);
    int temp=a[0];
    a[0]=a[len-1];
    a[len-1]=temp;

}
int main(void)
{
    int a[5]={1,2,3,4,5};
    covert(a,5);
    for(int i=0;i<5;i++)
    printf("%d\n",a[i]);


    char arr[]="afds.dff;ydd qyy;suk";
    char *p;
    p=strtok(arr," ,.;");
    while(p!=NULL)
    {
        printf("%s\n",p);
        p=strtok(NULL," ,.;");
        
    }
    char s[]="abcd";
    printf("%d\n",strncmp("abcd","abcf",4));
    return 0;
}